# Holdover Calculator vs FBO Request

The clearest difference is review sentiment: Holdover Calculator at 83% against FBO Request's 0%. Holdover Calculator also leads on rating (5.0 vs 3.0) and chart position (#165 vs unranked). FBO Request's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 26.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Holdover Calculator sells 1 in-app purchase, starting at $9.99 per year. FBO Request asks for nothing beyond the download.

Holdover Calculator holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 83% of Holdover Calculator's written reviews are positive against 0% of FBO Request's.

Holdover Calculator ships an update monthly, FBO Request every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Holdover Calculator | FBO Request |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/holdover-calculator/id768019181/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/fbo-request/id1628702863/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | **83.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Subscription | **Free** |
| Best chart rank | **#165** | — |
| Size | 24 MB | 19 MB |
| Requires iOS | 26.0 | **12.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kilo Lima Management, LLC](https://appshunter.io/developer/767164799) | [FBORequest LLC](https://appshunter.io/developer/1526836537) |

## What reviewers say

### Holdover Calculator

[App page](https://appshunter.io/ios/app/holdover-calculator/id768019181)

**Currently charting:** #165 Top Grossing · Weather (US App Store)

This tool simplifies the calculation of aircraft de-icing fluid holdover times. It offers manual input or automatic weather data retrieval for quick and accurate results. The app provides alerts for expired times and includes a pre-takeoff check timer.

**Highlights:** Accurate holdover time verification, User-friendly input display, Automatic METAR weather retrieval, Location-based METAR search, Active holdover time countdown, Audible and visible expiration alerts, Pre-takeoff contamination check timer

**Features:** Apple Watch app, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Year Subscription | $9.99 | per year |


### FBO Request

[App page](https://appshunter.io/ios/app/fbo-request/id1628702863)

Manage aircraft service requests on the FBO Request platform. Submit new requests, track existing ones, and update details efficiently. Streamline your aviation operations with this dedicated utility.

**Highlights:** Submit new requests, View existing requests, Update request details, Manage aircraft services, FBO platform integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Holdover Calculator free?

Holdover Calculator is free to download, with in-app purchases available.

### Is FBO Request free?

FBO Request is free to download, with no in-app purchases.

### Which has better reviews, Holdover Calculator or FBO Request?

Holdover Calculator is rated higher. Holdover Calculator averages 5.0 out of 5 from 1 ratings, while FBO Request averages 3.0 from 2 ratings.

### Do Holdover Calculator or FBO Request have ads?

Neither Holdover Calculator nor FBO Request shows ads.

### Which is updated more often, Holdover Calculator or FBO Request?

Holdover Calculator ships an update monthly, and FBO Request every 2 months. Most recently, Holdover Calculator was updated on November 6, 2026 and FBO Request on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*